Abstract：
In this work, the Mn, Co, Ce co-doped corn cob biochar (MCCBC) as catalytic particle electrodes in a three-dimensional heterogeneous electro-Fenton-like (3D-HEFL) system for the efficient degradation of coking wastewater was investigated. Various characterization methods such as SEM, EDS, XRD, XPS and electrochemical analysis were employed for the prepared materials. The results showed that the MCCBC particle electrodes had excellent electrochemical degradation performances of COD in coking wastewater, and the COD removal and degradation rates of the 3D/HEFL system were 85.35% and 0.0563 min-1 respectively. RSM optimized conditions revealed higher COD removal rate at 89.23% after 31.6 min of electrolysis. The efficient degradability and wide adaptability of the 3D/HEFL system were due to its beneficial coupling mechanism, including the synergistic effect between the system factors (3D and HEFL) as well as the synergistic interactions between the ROS (dominated by •OH and supplemented by O2•-) in the system. Moreover, the COD removal rate of MCCBC could still remain at 81.41% after 5 cycles with a lower ion leaching and a specific energy consumption of 11.28 kWh kg-1 COD. The superior performance of MCCBC, as catalytic particle electrodes showed a great potential for engineering applications for the advanced treatment of coking wastewater.
摘要：
在这项工作中,Mn,Co,研究了Ce共掺杂玉米芯生物炭（MCCBC）作为催化颗粒电极在三维非均相电芬顿（3D-HEFL）系统中对焦化废水的高效降解。各种表征方法，如SEM，EDS,XRD,对所制备的材料采用XPS和电化学分析。结果表明,MCCBC颗粒电极对焦化废水中的COD具有优异的电化学降解性能,3D/HEFL系统的COD去除率和降解率分别为85.35%和0.0563min-1。RSM优化条件显示，电解31.6min后，COD去除率更高，为89.23％。3D/HEFL系统的高效降解性和广泛的适应性是由于其有利的耦合机制，包括系统因素（3D和HEFL）之间的协同作用以及系统中ROS（以•OH为主，以O2•-补充）之间的协同作用。此外，MCCBC的COD去除率在5个循环后仍可保持在81.41％，离子浸出较低，比能耗为11.28kWhkg-1COD。MCCBC的优越性能，作为催化粒子电极，在焦化废水深度处理的工程应用中显示出巨大的潜力。
